10-23-2008 01:52 AM - edited 03-15-2019 02:07 PM
Hi all,
Is there any way to configure a cisco mgcp gateway to only support G711 codec, i have see a command on the gateway "mgcp codec" that could do this.
Can any one help me on this
Many thanks
10-23-2008 02:25 AM
There is no specific requirement to configure MGCP for G711 through the command 'mgcp codec'.
The reason for this is that the mgcp codec is automatically configured for G711ulaw as soon as MGCP is enabled on the gateway.
I have capture the output of a show mgcp after enabling in on the gateway for your reference:-
Router(config)#mgcp
Router(config)#do show mgcp
MGCP Admin State ACTIVE, Oper State ACTIVE - Cause Code NONE
MGCP call-agent: none Initial protocol service is MGCP 0.1
MGCP validate call-agent source-ipaddr DISABLED
MGCP validate domain name DISABLED
MGCP block-newcalls DISABLED
MGCP send SGCP RSIP: forced/restart/graceful/disconnected DISABLED
MGCP quarantine mode discard/step
MGCP quarantine of persistent events is ENABLED
MGCP dtmf-relay for VoIP is SDP controlled
MGCP dtmf-relay for voAAL2 is SDP controlled
MGCP voip modem passthrough disabled
MGCP voaal2 modem passthrough disabled
MGCP voip modem relay: Disabled
MGCP T.38 Named Signalling Event (NSE) response timer: 200
MGCP Network (IP/AAL2) Continuity Test timer: 200
MGCP 'RTP stream loss' timer: 5
MGCP request timeout 500
MGCP maximum exponential request timeout 4000
MGCP gateway port: 2427, MGCP maximum waiting delay 3000
MGCP restart delay 0, MGCP vad DISABLED
MGCP rtrcac DISABLED
MGCP system resource check DISABLED
MGCP xpc-codec: DISABLED, MGCP persistent hookflash: DISABLED
MGCP persistent offhook: ENABLED, MGCP persistent onhook: DISABLED
MGCP piggyback msg ENABLED, MGCP endpoint offset DISABLED
MGCP simple-sdp DISABLED
MGCP undotted-notation DISABLED
#################################
MGCP codec type g711ulaw, MGCP packetization period 20
#################################
MGCP JB threshold lwm 30, MGCP JB threshold hwm 150
MGCP LAT threshold lwm 150, MGCP LAT threshold hwm 300
MGCP PL threshold lwm 1000, MGCP PL threshold hwm 10000
MGCP CL threshold lwm 1000, MGCP CL threshold hwm 10000
MGCP playout mode is adaptive 60, 40, 200 in msec
MGCP Fax Playout Buffer is 300 in msec
MGCP media (RTP) dscp: ef, MGCP signaling dscp: af31
MGCP default package: trunk-package
MGCP supported packages: gm-package dtmf-package trunk-package line-package
hs-package atm-package ms-package dt-package mo-package
res-package mt-package fxr-package md-package
MGCP Digit Map matching order: shortest match
SGCP Digit Map matching order: always left-to-right
MGCP VoAAL2 ignore-lco-codec DISABLED
MGCP T.38 Max Fax Rate is DEFAULT
MGCP T.38 Fax is ENABLED
MGCP T.38 Fax ECM is ENABLED
MGCP T.38 Fax NSF Override is DISABLED
MGCP T.38 Fax Low Speed Redundancy: 0
MGCP T.38 Fax High Speed Redundancy: 0
MGCP Fax relay SG3-to-G3: ENABLED
MGCP control bind :DISABLED
MGCP media bind :DISABLED
MGCP Upspeed payload type for G711ulaw: 0, G711alaw: 8
MGCP Dynamic payload type for G.726-16K codec
MGCP Dynamic payload type for G.726-24K codec
MGCP Dynamic payload type for G.Clear codec
MGCP Dynamic payload type for NSE is 100
MGCP Dynamic payload type for NTE is 99
MGCP rsip-range is enabled for TGCP only.
MGCP Guaranteed scheduler time is disabled
MGCP DNS stale threshold is 30 seconds
HTH
Allan.
10-23-2008 03:50 AM
Hi Allan,
Is there any configuration to disable the support for G729 codec on the gateway and only support G711.
Thanks
10-23-2008 04:00 AM
Hi Patricio, are there specific reasons why you are trying to limit or influence which codec is selected for inbound and/or outbound calls?
Your Regions and Device-Pools will determine what codec your endpoints will negotiate, therefore G729 will only be used if you explicitly configure it.
HTH
Allan.
10-23-2008 09:40 AM
Hi Allan,
I have a specific scenario where on the headquartes i have a cisco mgcp gateway with a voice guide that has to be played in G711 codec to the brach office, but since the branch has slow link i want to add a trancoding resorce betwen the heardquatres and the branch to force a G711 betwen the headquarter and the trancoder and a G729 betwen the branch and the transcoder. The gateway on the headquarters need to be configured with mgcp.
Many thanks
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